Problem is a whole lot use that as a reason to not put any effort forth. The succesful people became successful in spite of it not because of it.
I suppose that depends on your definition of success. One of the keys of life, in my view, is figuring out what is important and what is not. Vrai's boy is a perfect example. He has a life we are both absurdly happy about and the only person happier is him, and he absolutely did not go about things as we would have preferred. What he did do, and this was early on, was, have a good sense of who he was as a person, right and wrong, and figured out how to get things to work. What was important and what was bull####. An enormous part of schooling is, for all practical purposes, bull#### unless you're going to specialize in 'it'; English, sciences, math.
Now, I will say this much; his mother stressed out about it every single day and pretty much spent from his 13th birthday to his 16th, maybe 17th, trying to find good reasons to not kill him as an obligation to protect the rest of society. His first venture into the land of the Honor Roll damn near killed her for the shock and sense of relief. He did it, big whoop, moved on, acing the stuff he enjoyed (not much) and getting by in the rest, choosing to go work after school instead of stressing and obsessing over the SAT/ACT, book report, resume building crap 'success path' that we expect of our kids.
So, maybe that is the key, the day to day brawl of trying to convince the kid that what is really never going to be important, like 11th grade English, actually is, thereby giving him the chance to pretend to care while actually figuring out how to work the system?
Success is a mind set. Not a GPA.